Process for rendering soluble the products of oxidation of linseed-oil.



UNITED STA'LES PA EN OFFICE.

man LOUIS FELIX rnmnnmauu, or ronsnaea, swnnnu.

PROCESS r013. nnunname SOLUBLE THE rnonuc'rs or o-xinA'rIoN or LINSEED-OIL.

Specification of Letters Patent; i Patented R 1914. Application filed lanuary 3, 1913.; Serial No. 740,431,

No Drawing.

To all whom, it ma concern: V P

Be it known t at I,'-KARL LOUIS FELIX FRLEDEMANN, a citizen'of the Kingdom of Sweden, residing at Forshaga, Sweden, have ,invented a new and useful Improved Process for Rendering Soluble the Products of Oxidation of LinseecbOil, of which the fo lowing is a specification;

This invention relates to a process for renderin soluble the products of oxidation of linsee oil by organic solvents boiling at a low temperature, such as alcohol, chloro:

. form, benzol and the like.

It is a well known fact that the products of oxidation of linseed oil, which have been" obtained byoxidation effected by introducing air or other gases rich in oxygen into the linseed oil at a comparatively low temperature, and which roducts consist probably of linoxyn Cg H O and linoxynic acid (0 ,11, 0 have found a com- 1 v para-tively wide scope of application in the various arts. They form for instance the elastic substance of linoleum, linoleum carpets and the llke. Further it has frequently been suggested to use these oxidation products as substitutes for'rubber. These oxidation products, however, could hitherto only.

be 'used in connection with those industrial processes which permitted said productsbeing either kneaded or fused together with other substances, whereas in cases where only solutions can be used it was impossible to employ saidproducts, ashither'to. they were considered to be practically insoluble.

There are it is true. some instances where one succeeded in producin cloudy or muddy, viscous and evengge atinous solutions, but it has never been possible to make and extensive-scope jof application is opened up to the produc'ts', of oxidation of linseed oil. Among others, the following new "ap-' plicationspf thfise products miy be men-' tioned, namely 't e impregnation of all. kinds' of textile fabrics in order to render them water-proof or capable of resisting the ac- .tion of water, and the impregnation of 7 leather for the purpose ofrendering the fication.

same water-proof or for increasing its re- I sistance to wear.

The invention substantially consists in treating the roducts of oxidation of linseed oil, chiefly' inoxyn and linoxynic acid, with a concentrated fatty acid having a moderate or low boiling point, preferably acetic acid, and in partially or wholly evapo- 1 rating said acid. The product thus obtained 1s; soluble,'-;for instance, in alcohol, chloroform, benz'ol, and other solvents. The "soluvtions are perfectly clear, possess aucomparatively low degree of viscosity, and may be made of very great strength.

recess may. be carried out for instance 1n the following manner: About the same parts of weight of'oxidation products of linseed oil and toncentrated acetic acid are mixed together and boiled about one hour; Thereupon the greater part of the acetic acid, about 80%, is distilled ofi' whereuponthe remaining acetic acid or a part thereof is allowed to evaporate while theproduct is-stirred and cooled.

,It is preferable toha-ve a small per cent. of

the acetic acid remain-in the product in or der to prevent the latter from being burnt, such roduct, as is the case with oxidized linsee oil when .not mixed with a fatty acid, being very sensitiveto temperatures above its melting point (about 125 0.), and theco'mplete removal of the acetic acid therefore'mustbecarried out with great care suitably by means of a source of'heat that is not capable of heating the product over 125 C. If this temperature is passed it easily happens that the oxidized linseed oil product is converted into an insoluble'modi- A few examples for employing the prod-t not obtained by treating it with concentrated acetic acid for impregnation. purposes will be'described in the following: In cases where the articles to be manufactured 'must possess a high, degree-of elasticity and must be capable of resisting the effects of frequent bending and the tendency to crack, which apphes for instance to tarpaulins, yarn, leather for the uppers, of footwear, .and the like, prefer-ably solutions" of oxidation products of the linseed oil in aromaticthin hydrocarbons may beemployed. The strength of the solutions varies 1n:a.c"coi'dan e=with the purpose for-which the article Articles impregnated with such solutions are sare intended.

I than before.

been evaporated, the impregnated articles not only water-proof, but also more durable Further after the solvent has are perfectly dry andodorless and do not become brittle, which often happens after the lapse of some time in connection with such articles which have been impregnated with preparations mainly consisting of linseed oil and linseed oil varnish.

For the purpose of impregnating substances which need not possess such a high degree of elasticity, for instance, leather used for the soles of boots, and the like, a greater or smaller quantity of resins and copals may be added to. the oxidation products of the linseed oil, in which case said additions may be dissolved simultaneously with the oxidation products in the acetic acid. After the acetic acid has been evaporated, the same secondary solvents as mentioned in the first example may be employed. For the purpose of impregnating leather used for making soles, a alcoholic solution is for instance prepared in which the leather is placed and allowed to remain therein for a few hours. This treatment may if required be repeated one or more times. Leather which has been impregnated in this manner is capable of offering great resistance to wear without its elasticity being substantially diminished.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

l. The process of rendering soluble the products of oxidation of linseed oil in organic solvents, which consists in' boiling a.

which consists in mixing together said oxidation products and a concentrated fatty acid boiling at a temperature of 100 to 150 (1, and thereafter evaporating said acid.

4. The process of rendering soluble the products of oxidation of linseed oil (linoxyn and linoxynic acid) in organic solvents, which consists in mixing together about like parts of weight of said oxidation products and of concentrated acetic acid, boiling the mixture about one hour, and evaporating the main part of the acetic acid.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

KARL LOUIS FELIX FRIEDEMANN.

Witnesses:

CONRAD DELMAR, JOHN DELMAR. 

